according to article 3 of the current patent law, if an applicant claims priority, he shall make a written statement at the time of application and submit a copy of the first patent application document within three months; Where a written statement is not submitted or a copy of the patent application document is not submitted within the time limit, it shall be deemed that the priority has not been claimed.
the meaning of priority is: when applying for a patent, if you have applied for the same patent before (within 12 months), you can enjoy the filing date of the previous patent application when applying for the patent, provided that there must be a patent application with the same content in front of you. It's not a priority to apply for a patent for the first time.